Malicious PDF — malware analysis report

Static analysis result for SHA-256 b165668834bceb5f…

MALICIOUS

PDF

79.0 KB Created: 2021-02-25 17:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 799ba1880d0bba18c4222d48cee7fbe6 SHA-1: 266bc877067c0a95a16abbe97190300928bed328 SHA-256: b165668834bceb5f7eeef33cf97134721d9f3b3155013238f266139a65117b36
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to career training, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/aws?utm_term=how+to+train+to+become+an+interior+designer
    • https://cdn.sqhk.co/dudugetogi/dgghaih/samsung_voice_assistant_turn_off_lock_screen.pdf
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5fedf1305ca12.pdf
    • http://barberking.best/meaning_cost_sheetbodzu.pdf
    • https://static.s123-cdn-static.com/uploads/4416669/normal_5fcfa1b21c51b.pdf
    • https://cdn.sqhk.co/tinolaseja/EUgduWb/tudikimonivorogalu.pdf
    • https://cdn.sqhk.co/jemajujo/jijjihv/summon_dragons_tier_list.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_60120efc6699e.pdf
    • https://cdn.sqhk.co/rozesivotix/fuhfzvR/brain_on_physics_box_puzzle_mod_apk.pdf
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/ziruxepovefor_lebuso_sofowedafur.pdf
    • https://cdn.sqhk.co/numovasovev/hihbjcv/3_mystery_words_level_16.pdf
    • http://sodahq.pro/zoxirepodokorimukvgsmu.pdf
    • http://spainsale.pro/waving_through_a_window_drum_sheet_musicvdfys.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bogeguva/diccionario_enciclopdico_bblico_ilustrado_editorial_clie.pdf
    • https://s3.amazonaws.com/jefobexapulow/simple_drink_menu_template.pdf
    • https://s3.amazonaws.com/rizijubovapuk/hechos_16_6-40.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa39.bin
29558f0fba4333e440afc8d10961a3d6a2a1cdb4734973d2ba4e3c9c20463adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 5420 bytes
font_01_sfnt_off00010c9a.bin
93d7012fa1f0e959c0458746f003a59a012fd57dc37cef125451a521b2768161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9A 10240 bytes

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